Expansible woven tubing



INVENTOR ATTORNEYS July 23, 1935. H. E. THOMPSON EXPANSIBLE WOVEN TUBING Filed June 2, 1934 Hale/Pr E Z90 MPJO/V,

Patented July 23, 1935 UNITED STATES ATENT OFFIQE 2,009,075 EXPAN SIBLE WOVEN TUBING Harry E. Thompson, Providence, R. I., assignor to Anaconda Wire & Cable Company, New York, N. Y., a corporation of Delaware Application June 2, 1934, Serial No. 728,805 3 Claims. (01. 13'7 90) This invention relates to improvements in resist tearing and its life will exceed that of all Woven tubing characterized particularly by the rubber tubes, in which it is well known that, when inclusion of a filling strand by resilient material, the same are expanded and stretched over fitsuch as a rubber thread-like member either with tings, they are short lived. The tubing of my 5 or without a covering of yarn. invention while not limited thereto is well suited 5 The invention will be apparent from the followfor use in windshield wiper installations for motor ing detailed disclosure when read in connection vehicles and the same can be readily snugly enwith the accompanying drawing and will be degaged with metal fittings, so as to prevent air lined with particularity in the appended claims. leakage or loss of vacuum.

In the drawing- The inner rubber coating or lining, it will be 10 Fig. l is a view partly in elevation and partly understood forms an impervious layer which fills in section, the thickness of the parts being someor seals the interstices between the warp and what exaggerated in the interest of clear illusfilling strands.

tration; Fig. 2 is a detail View on an exaggerated The elastic filling strands, whether yarn covscale of a filling strand such as used in tubing in ered or plain, it will be understood permit the one embodiment of the invention; Fig. 3 is a View tube to be expanded in a radial direction. The similar to Fig. 1, illustrating a modification; Fig. 4 adjacent convolutions of the helical filling strand illustrates the application of the invention. are substantially circular in the finished tube The woven tubing of the present invention in- While the fibrous warp strands are substantially 2 eludes interwoven warp and filling strands, the straight and parallel with the axis of the tube. warp strands being of cotton or other suitable This relationship is deemed important because fibrous material. Interwoven with the filling the warp strands are capable of withstanding strands, there is a strand having greater elasconsiderable tension without having a tendency ticity than the fibrous strands usually employed tO- reduce the d a et of h b y Combined in woven tubings. For example, the tubing inelastic and fibrous tube distinguishes from an cludes longitudinally extending warp strands I0 ordinary rubber tube, in which it is known that of cotton, interwoven with helical filling strands a tension tends to constrict the same and reduce l2, such as shown in Fig. 2. The filling strands l2 its internal diameter.

in this embodiment include an elastic member While the invention has been described with it of rubber or extruded filamentary body of particular reference to the embodiments illuslatex, covered with an outer layer or yarn, such trated, it is intended that the drawing and deas indicated at 16. In some cases, instead of scription are to be interpreted in an illustrative covering the filling thread with yarn, I may emrather than a limiting sense.

ploy a plain elastic strand of rubber, as indicated What I claim is:-

at E8 in Fig. 3, which helical filling strand will 1. An expansible tubing of the character de be interwoven with a fibrous cotton or other scribed comprising interconnected fibrous and fibrous strands iii. In both forms of the invenelastic strands bonded to an impervious internal tion, the tube will preferably be provided with an oati g so t at the St ucture Of thfi tube as a interior coating 26 of rubber. This rubber may Whole is eXpansible and Contract/11018- be the residue of an aqueous dispersion of latex. An expansible tubing of the character 40 described comprising longitudinally extending fibrous warp strands interwoven with helical filling strands of rubber covered with cotton yarn, said interconnected strands being united with an interior coating of rubber so that the tube The tubing may also be treated with asphalt, pitches and the like and may be coated either inside or outside with lacquer. The tubing of my invention, which includes as an essential element 45 the elastic filling strand, will be expansible radially. This expansibility of the tubing is adg gg f gfigg fi gfi zg gfggfi2 :3 a i gi igizg g iggsgg gfi filigfi g ing including cotton warp strands interwoven 5a 6 o e Snug y with helical filling strands of rubber and a coatf with fittmg Such as ing of rubber bonded to such interwoven warp 5O mdlcated I and filling strands forming an impervious layer t ll 'id ig g g finmg t qih ig which fills or seals the interstices between the 0 0- e 11 mg 111 engage-men W1 9 warp and filling strands. fitting. And because the tubing is formed of interwoven fibrous and elastic strands the same will HARRY E. THOMPSON. 5 

